Air-valve.



No. 812,451. PATENTED FEB. 13, 1906. w. LRIGB.

AIR VALVE.

APPLICATION FILED NOYHZ. 1904. RENEWED JULY 22, 1906.

FIG. I.

I .WVEN TOR.

WITWESEES! UNITED STATES PATENT OFFICE. WILLIAM J. RICE, OF MASON CITY, IOWA.

' AIR-VALVE.

Specification of Letters Patent.

Patented Feb. 13, 1906.

To all whom it may concern:

-Be it known that I, WILLIAM J. RICE, a citizen of the United States, residing at Mason City, in the county of Cerro Gordo and State of Iowa, have invented certain new and useful Improvements in Air-Valves; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertainsto make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

My invention relates to improvements in air-valves for hot-water radiators; and the objects of the invention are, first, to provide an air-valve which will 0 erate automatically, allowing the escape 0 all air, but no wa ter, from the radiator; second, to provide such valve with means which may be operated at will to prevent also the escape of air when so desired; third, to provide an airvalve through which no water can be drawn. These objects I attain. by the novel construction and arrangement of parts illustrated in the accompanying drawings, in whichthe device.

Figure 1 1s a top view of the device, and Fig. 2 is a vertical diametrical section of the device.

" Referring to the drawings by referencenumerals, 1 designates the float-chamber of This chamber is provided at its bottom end with a screw-threaded tubular projection 2, by which communication with the upper part of a hot-water radiator or heater is established. The top of the shell 1 is closed by a cap 3, upward through which is screwed and adjustably held by a j am-nut 4 a tube 5, whose lower end is flared out to a comparatively large funnel shaped valveseat 6.

In the chamber .1 is provided a preferably hollow float 7, having in its top fixed a screwthreaded rod 8, which is guided very loosely in the tube 5 and is provided with two nuts 9 and 10, of which the nut 9 normally rests upon the upperend of the tube 5, closing it, and the nut 10 holds firmly upon the float a hemispherical rubber valve 11, which when the float is raised fits the valve-seat 6, and thus closes the tube 5.

Upon the upper end of the' tube 5 is screwed a hand-operated cap 12, of which the central portion is solid, so that it may press upon the top end. of the rod 8, while beyond its center portion it is provided with apertures 13 for the escape of air.

From the above description it will be understood that when theradiator is not full of water the chamber 1 is empty, and the weight of the float 7 holds the nut or upper valve 9 lightly down upon the tube 5, and when the water fills into the radiator it drives the air upward through the tube 5, said air raising the valve 9 and escaping through the apertures 13 until the water raises the float 7, so that the valve ,11 closes the lower end of the tube 5, and

whenever it is desired to prevent the escape of air from the radiator the ca 12 is screwed down until its center portion olds the valve 9 firmly down upon the tube 5.

Having thus described my invention, what I'claim, and desire to secure by Letters Patent, is

,1. In an air-valve, the combination of a float-chamber having an inlet in its lower part and a tube forming an outlet in the upper art, a float in the chamber, a rod extending om the float and loosely upward through the tube, a valve secured on the lower end of the rod, and another valve secured on the upper end of the rod to close alternately the opposite ends of the tube, the float being normally suspended from the upper valve.

2. In an air-valve, the combination of a float-chamber having an inlet in its lower part and a tube forming an outlet in the up per part, a float in the chamber, a rod extending from the float and loosely upward through the tube, a valve secured on the lower end of the rod, and another valve secured on the upper end of the rod to close alternately the opposite ends of the tube, the float being normally suspended from the upper valve, and a cap screw-threaded upon the upper end of the tube and adapted to hold the upper valve closed when so desired, said cap having apertures for the air to escape when the cap is not- 2 si,45i

the rod, and another valve secured on the In testimony whereof I aflix my signature upperend of the rod to close 1gnllterlgetely the in presence of two witnesses.

opposite ends of the tube, the out eing nornmlly suspended from the upper valve, said WIL L M RICE tube being adjustable up and down in the Witnesses:

top of the chelnbei', and a 'am-nut to hold JOE ROAOH, the tube firmly at the desire elevation. FRED D. BLAKE. 

